mapWithNewMeta
fun <NEXT, IN : Any, OUT> BiDiLensSpec<IN, OUT>.mapWithNewMeta(mapping: BiDiMapping<OUT, NEXT>, paramMeta: ParamMeta): BiDiLensSpec<IN, NEXT>
fun <IN, NEXT> BiDiPathLensSpec<IN>.mapWithNewMeta(mapping: BiDiMapping<IN, NEXT>, paramMeta: ParamMeta): BiDiPathLensSpec<NEXT>